A 81-year-old woman was referred to our hospital for a stomach pain. Abdominal enhanced CT scan showed a pancreatic hypovascular tumor 10mm in size. Abnormal FDG uptake was found on the tumor at FDG/PET-CT examination. The tumor was identified also at endoscopic ultrasonography, and the endoscopic ultrasound-guided fine needle aspiration biopsy of this tumor gave the diagnosis of pancreatic adenocarcinoma. Under the preoperative diagnosis, laparoscopic distal pancreatectomy was performed. There were no postoperative complications. Histopathological examination of the resected tumor revealed acinar cell carcinoma of the pancreas, not pancreatic adenocarcinoma. The patient is alive without any postoperative recurrences 1 year after the pancreatectomy.